US4958859A - Pre-assembly muff for the cutting or clamping ring of a pipe coupling - Google Patents

Pre-assembly muff for the cutting or clamping ring of a pipe coupling Download PDF

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Publication number
US4958859A
US4958859A US07/345,782 US34578289A US4958859A US 4958859 A US4958859 A US 4958859A US 34578289 A US34578289 A US 34578289A US 4958859 A US4958859 A US 4958859A
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US
United States
Prior art keywords
muff
assembly
pipe
inner cone
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/345,782
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English (en)
Inventor
Mathias Konrad
Wolfgang Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JEAN WALTERSCHEID FED REP OF GERMANY GmbH
Walterscheid GmbH
Original Assignee
GKN Walterscheid GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GKN Walterscheid GmbH filed Critical GKN Walterscheid GmbH
Assigned to JEAN WALTERSCHEID GMBH, FED. REP. OF GERMANY reassignment JEAN WALTERSCHEID GMBH, FED. REP. OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KONRAD, MATHIAS, WEBER, WOLFGANG
Application granted granted Critical
Publication of US4958859A publication Critical patent/US4958859A/en
Assigned to GKN WALTERSCHEID GMBH reassignment GKN WALTERSCHEID GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: JEAN WALTERSCHEID GMBH
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/083—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/10—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts with metal rings which bite into the wall of the pipe the profile of the ring being altered

Definitions

  • This invention relates to a pre-assembly muff for fitting a cutting or clamping ring of a pipe coupling, which comprises an inner cone which is designed to support the ring slid on to the pipe and into which the ring may be pressed.
  • clamping rings or cutting rings are frequently not fitted on the pipe during the final pipe assembly, but they are pre-assembled in advance.
  • the special purpose of this measure is to ensure a functionally accurate connection between the pipe and the clamping or cutting ring.
  • the rings are pre-fitted by using a pre-assembly muff.
  • the pre-assembly muffs used are suitable for being operated by hand or by an assembly machine.
  • the invention provides a pre-assembly muff for fitting a cutting or clamping ring of a pipe coupling on a pipe, which comprises an inner cone which is designed to support the ring slid on to the pipe and into which the ring may be pressed, wherein the surface of the inner cone has been provided with a wear resistant coating whose color differs from that of the base material.
  • the wear resistant coating preferably has a higher strength than the base material, the advantage of this feature of the invention being that at the same time the wear strength of the pre-assembly muff is increased.
  • the first coating applied to the base material should differ in color substantially.
  • a preferred wear resistant coating whose color differs from that of the base material is a titanium nitrite coating.
  • aluminium-silicate or a hard chromium coating are known in themselves.
  • FIG. 1 is a side elevational view, partly in section, of a coupling including a cutting ring;
  • FIG. 2 is a side elevational view, partly in section, of a pre-assembly muff for manual assembly
  • FIG. 3 is a view similar to FIG. 2 but of a pre-assembly muff to be inserted by an assembly machine.
  • the pipe coupling shown in FIG. 1 shows a coupling member 1, a nut 2, a cutting ring 3 inserted between the nut 2 and the member 1 and a pipe 4 introduced into the coupling member 1 through the nut 2 and the cutting ring 3.
  • the member 1 comprises a bore 8 decreasing conically and extending into its interior. This conical bore 8 is followed by a cylindrical bore with a bore step against which the pipe 4 is supported.
  • the member 1 has been provided with an external thread 7 on to which the nut 2 is threaded with its inner thread 10.
  • the nut 2 comprises a bore 9 decreasing conically away from the member 1.
  • the cutting ring 3 received between the member 1 and the nut 2 and slid across the pipe 4 comprises a conical face 6 which faces the member 1 and by means of which it is supported in the conical bore 8 of the member 1.
  • the cutting ring 3 comprises a further conical face 11 which faces the nut 2 and which comes to rest against the conical bore 9 of the nut 2.
  • FIG. 1 shows the pipe coupling in the assembled condition.
  • the pre-assembly muff 12 as shown in FIG. 2 essentially corresponds to the coupling member 1. It also comprises a bore 13 which decreases conically from its one end and which is referred to as the inner conical face.
  • the inner conical face 13 is followed by a cylindrical bore step 14 provided with a radially inwardly extending stop 15.
  • the two embodiments of the pre-assembly muff 12, 12a as shown in FIGS. 2 and 3 are identical.
  • the pre-assembly muff 12 illustrated in FIG. 2 is designed for being fitted by hand. For this purpose it has been provided with a thread 16 which corresponds to the outer thread 7 of the member 1 of the coupling and on to which the nut 2 is screwed. It also comprises a projection provided with flattened portions 17 which, for example, may serve to clamp the pre-assembly muff 12 into a vice. For assembly purposes, first a nut 2 and then a cutting ring 3 or clamping ring are slid on to the pipe 4. The pipe 4, together with the cutting ring 3, is then introduced into the pre-assembly muff 12 so that the cutting ring 3 is supported on the inner conical face 13.
  • the pre-assembly muffs 12 are made of a higher-strength material because they assist the cutting operation of the blades 5.
  • the relative movement between the cutting ring 3 or clamping ring and its outer face 6 and the inner cone 13 of the pre-assembly muff, under high pressure, causes material removal or wear.
  • the surface of the inner conical face 13 has been provided with a wear resistant coating, for instance of titanium nitrite colored yellow.
  • the coating is applied by processes known in themselves.
  • the color of the wear resistant coating differs from that of the base material. If, due to frequent use of the pre-assembly muff 12, the wear resistant coating applied to the inner conical face 13 has been removed or is worn, the color of the base material emerges. As its color differs from that of the coating, the user can quite easily see that the wear resistant coating normally indicating that the necessary dimensions of the inner cone ensuring accurate and functionally safe assembly still prevail, has been removed, with the base material shining through indicating the end of the service life.
  • the embodiment of the assembly muff 12a of FIG. 3 differs from that to FIG. 2 only in that the diameter in the region of the inner cone 13 has been reduced so that the nut can freely be moved across this region by the pressure punch of the assembly machine.
  • the pre-assembly muff 12a of FIG. 3 comprises a supporting collar for providing support in the tool holder of the assembly machine, as well as a projection 18 with which it is received in a corresponding bore of the assembly machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints With Pressure Members (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Joints With Sleeves (AREA)
US07/345,782 1988-06-09 1989-05-01 Pre-assembly muff for the cutting or clamping ring of a pipe coupling Expired - Fee Related US4958859A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3819635A DE3819635C1 (enrdf_load_stackoverflow) 1988-06-09 1988-06-09
DE3819635 1988-06-09

Publications (1)

Publication Number Publication Date
US4958859A true US4958859A (en) 1990-09-25

Family

ID=6356199

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/345,782 Expired - Fee Related US4958859A (en) 1988-06-09 1989-05-01 Pre-assembly muff for the cutting or clamping ring of a pipe coupling

Country Status (7)

Country Link
US (1) US4958859A (enrdf_load_stackoverflow)
JP (1) JPH0226395A (enrdf_load_stackoverflow)
DE (1) DE3819635C1 (enrdf_load_stackoverflow)
ES (1) ES2013494A6 (enrdf_load_stackoverflow)
FR (1) FR2632706B1 (enrdf_load_stackoverflow)
GB (1) GB2220271B (enrdf_load_stackoverflow)
IT (1) IT1233056B (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5098133A (en) * 1990-01-31 1992-03-24 General Electric Company Tube coupling with swivelable piston
US6641180B2 (en) * 2000-03-07 2003-11-04 Parker-Hannifin Corporation Screw connection
CN103807526A (zh) * 2012-11-13 2014-05-21 南车青岛四方机车车辆股份有限公司 卡套式金属密封管接头及其使用方法
CN104006233A (zh) * 2014-05-06 2014-08-27 合肥嘉伟装饰工程有限责任公司 中空玻璃旋转式快速夹紧充气接头
CN107101055A (zh) * 2017-06-20 2017-08-29 合肥太通制冷科技有限公司 一种铝管保压快速夹紧充气接头
CN109027459A (zh) * 2018-10-18 2018-12-18 海盐管件制造有限公司 一种卡套式平面密封活对接管接头及装配方法
CN114962811A (zh) * 2022-06-06 2022-08-30 海盐管件制造有限公司 一种无卡套管接头

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004184676A (ja) 2002-12-03 2004-07-02 Japan Aviation Electronics Industry Ltd 光ファイバアレイ用整列部材及びそれを用いて作製された光ファイバアレイ
CN110666740B (zh) * 2019-10-23 2020-11-24 中国电子科技集团公司第二十九研究所 一种用于smp射频同轴连接器的装卸工具及其使用方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2139413A (en) * 1932-11-26 1938-12-06 Patex Sa Joint for pipes
US2230116A (en) * 1938-10-31 1941-01-28 Patex Sa Pipe coupling
US2414995A (en) * 1944-09-27 1947-01-28 Paul D Wurzburger Pipe coupling
US3643984A (en) * 1969-09-10 1972-02-22 Autoclave Eng Inc Plastic coated ferrule for a tube coupling
US4630851A (en) * 1982-03-30 1986-12-23 Fujikin International, Inc. Pipe couplings

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE685872C (de) * 1936-11-12 1939-12-28 Hans Kreidel Dichrung fuer Rohrverschraubungen
DE1844482U (de) * 1961-10-06 1962-01-04 Henschel Werke G M B H Presse fuer die befestigung von keilringen an rohren.
SE338698C (sv) * 1970-06-26 1977-10-17 Sandvik Ab For skerande bearbetning av stal, gjutjern eller liknande avsett sker
DE2158727A1 (de) * 1971-01-25 1972-08-03 Teledyne Inc Werkzeugmaschineneinsatz
DE3610427A1 (de) * 1986-03-27 1987-10-01 Walterscheid Gmbh Jean Verfahren und vorrichtung zur vormontage und endmontage einer schneidringverbindung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2139413A (en) * 1932-11-26 1938-12-06 Patex Sa Joint for pipes
US2230116A (en) * 1938-10-31 1941-01-28 Patex Sa Pipe coupling
US2414995A (en) * 1944-09-27 1947-01-28 Paul D Wurzburger Pipe coupling
US3643984A (en) * 1969-09-10 1972-02-22 Autoclave Eng Inc Plastic coated ferrule for a tube coupling
US4630851A (en) * 1982-03-30 1986-12-23 Fujikin International, Inc. Pipe couplings

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5098133A (en) * 1990-01-31 1992-03-24 General Electric Company Tube coupling with swivelable piston
US6641180B2 (en) * 2000-03-07 2003-11-04 Parker-Hannifin Corporation Screw connection
CN103807526A (zh) * 2012-11-13 2014-05-21 南车青岛四方机车车辆股份有限公司 卡套式金属密封管接头及其使用方法
CN103807526B (zh) * 2012-11-13 2017-02-22 中车青岛四方机车车辆股份有限公司 卡套式金属密封管接头及其使用方法
CN104006233A (zh) * 2014-05-06 2014-08-27 合肥嘉伟装饰工程有限责任公司 中空玻璃旋转式快速夹紧充气接头
CN107101055A (zh) * 2017-06-20 2017-08-29 合肥太通制冷科技有限公司 一种铝管保压快速夹紧充气接头
CN109027459A (zh) * 2018-10-18 2018-12-18 海盐管件制造有限公司 一种卡套式平面密封活对接管接头及装配方法
CN114962811A (zh) * 2022-06-06 2022-08-30 海盐管件制造有限公司 一种无卡套管接头

Also Published As

Publication number Publication date
DE3819635C1 (enrdf_load_stackoverflow) 1989-12-14
IT1233056B (it) 1992-03-14
FR2632706B1 (fr) 1992-09-04
GB8912007D0 (en) 1989-07-12
IT8905174A0 (it) 1989-06-08
JPH0226395A (ja) 1990-01-29
FR2632706A1 (fr) 1989-12-15
GB2220271A (en) 1990-01-04
GB2220271B (en) 1992-05-27
JPH0563676B2 (enrdf_load_stackoverflow) 1993-09-13
ES2013494A6 (es) 1990-05-01

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Legal Events

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AS Assignment

Owner name: JEAN WALTERSCHEID GMBH, FED. REP. OF GERMANY, GERM

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:KONRAD, MATHIAS;WEBER, WOLFGANG;REEL/FRAME:005078/0458

Effective date: 19890426

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: GKN WALTERSCHEID GMBH, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:JEAN WALTERSCHEID GMBH;REEL/FRAME:006737/0673

Effective date: 19930511

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19980925

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362